Stepper motors world-famous

Closely related in design to three-phase AC synchronous motorska5l0380r

 are stepper motors, where an internal rotor containing permanent magnets or a magnetically soft rotor with salient polesSTRF6426

 is controlled by a set of external magnets that are switched electronically. A stepper motor may also be thought of as a cross between a DC electricUCN5804B

 motor and a rotary solenoid. As each coil is energized in turn, the rotor aligns itself with the magnetic field produced by the energized field winding. Unlike a synchronousM56737FP

 motor, in its application, the stepper motor may not rotate continuously; instead, it "steps"?astarts and then quickly stops again?afrom one position to the next as field windings are energized andDS1497

 de-energized in sequence. Depending on the sequence, the rotor may turn forwards or backwards, and it may change direction, stop, speed up or slow down arbitrarily at any time.